Question

determine o valor numerico de cada equação:

a) x - 11 = -9​
b) 2x = -7
c) 3x + 2 = 2x - 11
d) 2x = 16
e) x/2 = -5
f) 2x + 14 = 5x - 1
g) 4x -5 = 5x +11
h) 5x +4 - 2x = 26 - 3x
i) 5m -7 - 2m -2 = 0
j) y - 8 + 5y = - 3 + 2y +7
k) -10 + 4 - 2x = - 4x - 7
l) 10x - 8 - 2 = 7x - 4
m) 3 (x + 2)+ 5 = x + 12
n) x + 4 (x - 1) = 9 - 2 (× + 3)​

Answer 1

Explicação passo-a-passo:

x - 11 = -9

X=-9+11

X=2

2x = -7

X=-7/2

3x + 2 = 2x - 11

3x-2x=-11-2

X=-13

2x = 16

X=16/2

X=8

x/2 = -5

X=2*-5

X=-10

2x + 14 = 5x - 1

2x-5x=-1-14

-3x=-15(-1)

3x=15

X=15/3

X=5

4x -5 = 5x +11

4x-5x=11+5

-x=16(-1)

X=-16

5x +4 - 2x = 26 - 3x

3x+4=26-3x

3x+3x=26-4

6x=22

X=22/6(÷2)

X=11/3

5m -7 - 2m -2 = 0

3m-9=0

3m=0+9

3m=9

m=9/3

m=3

y - 8 + 5y = - 3 + 2y +7

6y-8=4+2y

6y-2y=4+8

4y=12

y=12/4

y=3

-10 + 4 - 2x = - 4x - 7

-6-2x=-4x-7

-2x+4x=-7+6

2x=-1

X=-1/2

10x - 8 - 2 = 7x - 4

10x-10=7x-4

10x-7x=-4+10

3x=6

X=6/3

X=2

3 (x + 2)+ 5 = x + 12

3x+6+5=x+12

3x+11=x+12

3x-x=12-11

2x=1

X=1/2

x + 4 (x - 1) = 9 - 2(×+3)

X+4x-4=9-2x-6

5x-4=3-2x

5x+2x=3+4

7x=7

X=7/7

X=1